While farmers nationwide planted the most corn this year since 1937, growers in Kansas sowed the fewest acres in three years, instead turning to less-thirsty crops such as wheat, sorghum and even triticale, a wheat-rye mix popular in Poland. Meanwhile, corn acreage in Manitoba, a Canadian province about 700 miles north of Kansas, has nearly doubled over the past decade due to weather changes and higher prices.

Shifts such as these reflect a view among food producers that this summer’s drought in the U.S. — the worst in half a century — isn’t a random disaster. It’s a glimpse of a future altered by climate change that will affect worldwide production.

It’s going to be harder and harder to deny climate change when multinational companies like Cargill are preparing for it.